Saturn has at least 22 moons, 13 of which were not found until the Voyager flyby missions. Indeed, it is possible that additional small moons remain to be found. 
    Although all the large gaseous planets—Jupiter, Saturn, Uranus, Neptune—have rings structures, Saturn’s is the most dramatic. A few of Saturn’s magnificent rings are the B and C or “Crepe” rings, the outermost F ring, and the radial spokes. On close examination the rings appear something like the ridges on a record, with high ridges, or ringlets, separated by troughs. Each ringlet represents a variation in density—a build-up of particles much like a traffic jam represents a build-up of cars. Some of the density variations are caused by the gravitational tug